Cold hardiness & minimum temperature

Is Solanum crispum 'Glasnevin' (Solanum crispum 'Glasnevin')cold hardy? Hardiness zone & min temp

Also called Glasnevin Chilean potato tree, Chilean potato vine.

More about solanum crispum 'glasnevin'

About Solanum crispum 'Glasnevin'

Solanum crispum 'Glasnevin' · also called Glasnevin Chilean potato tree, Chilean potato vine · flowering

Solanum crispum 'Glasnevin' is a vigorous, semi-evergreen scrambling climber prized for clusters of star-shaped, purple-blue flowers with bright yellow centres borne from summer into autumn. It is one of the hardiest Solanums, needing a warm, sheltered wall, full sun, and tying-in to support as it does not self-cling. All parts are toxic if eaten.

Cold limit: USDA 8-10 · RHS H4 (-5 to 25°C)

Watch for — Frost damage: In cold winters or exposed sites stems can be killed back; grow against a warm, sheltered wall and mulch the base. Cut out damaged growth in late spring once regrowth shows.

What solanum crispum 'glasnevin''s hardiness rating actually means

Yes — solanum crispum 'glasnevin' is genuinely cold hardy. Rated RHS H4 and USDA 8-10, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H4 means: Hardy in an average winter across much of the temperate world. On the US scale that maps to USDA 8-10 — the zones where it can be left outdoors year-round.

New to these scales? The USDA hardiness zone map explained covers how the zone numbers work, and you can find your own zone with the zone finder.

Minimum temperature — and what happens below it

Minimum survivable temperature is roughly about −10 to −5 °C. Solanum crispum 'Glasnevin' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for solanum crispum 'glasnevin' as it gets too cold:

It tolerates winter lows to about −10 to −5 °C once established.
Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root.
First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.

Can solanum crispum 'glasnevin' go outside or overwinter — and where?

Plant it out within USDA 8-10 and it overwinters with little or no help.
It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy.
The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

Work back from your local frost dates with the frost-date calculator: the last spring frost and first autumn frost are what really decide when solanum crispum 'glasnevin' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Solanum crispum 'Glasnevin' hardiness — frequently asked questions

Is solanum crispum 'glasnevin' cold hardy?

Yes — solanum crispum 'glasnevin' is genuinely cold hardy. Rated RHS H4 and USDA 8-10, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Solanum crispum 'Glasnevin' is hardy across USDA 8-10; it belongs in the ground or a frost-proof container, not on a windowsill, and many types actively need a cold winter to perform.

What is the minimum temperature solanum crispum 'glasnevin' can survive?

Minimum survivable temperature is roughly about −10 to −5 °C. Solanum crispum 'Glasnevin' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is solanum crispum 'glasnevin'?

Solanum crispum 'Glasnevin' is rated USDA 8-10 and RHS H4 — Hardy in an average winter across much of the temperate world.

Can solanum crispum 'glasnevin' survive winter outside?

Plant it out within USDA 8-10 and it overwinters with little or no help. It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy. The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

What happens to solanum crispum 'glasnevin' below its minimum temperature?

It tolerates winter lows to about −10 to −5 °C once established. Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root. First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.